Wilhelm pickhaedt



UNITED STATES PATENT OFFICE.

WILHELM PICKHARDT, OF NEW YORK, AND HERMANN ENDEMANN, OF BROOKLYN, N. Y.

HYDROCHLORATE OF OXYCHINOLIN'E.

SPECIFICATION forming part of Letters Patent No. 257,829, dated May 9, 1882. Application filed March 21, 1882. (Specimens) To all whom it may concern Be it known that we, WILHELM PICKHARDT, a citizen of the United States, residing at New York, in the county and State of New York,

' 5 and HERMANN ENDEMANN, a citizen of the 20 then evaporate for crystallization. The crystals are freed from the mother-liquor, redissolvedin water, and the solution thus obtained, after deoolorizationwith animal charcoal, is evaporated for crystallization.

2 5 Our hydroehlorate of oxychinoline is soluble in very little hot water; but of cold water a larger quantity is required for solution. It is not hygroscopic. It is easily soluble in alcohol. 1ts solutions give the reactions for hydrochloric acid and for oxychinoline. 0

The principal advantage of our compound is that the same dissolves freely in hot and in cold water, and it can therefore be administered in solution, while the oxychinoline itself is almost insoluble in water, and in its pure 5 state it can be administered only in the form t of a powder. 7

What we claim as new, and desire to secure by Letters Patent, is-

The hydroehlorate of oxychinoline prepared 40 V by the action of hydrochloric acid upon the oxychinoline of Skraup, substantially in the manner above set forth.

In testimony whereof we have hereunto set our hands and seals in the presence of two sub- 5 scribing witnesses.

WM. PICKHARDT. in. 8.] H. ENDEMANN. [L. s.]

Witnesses 7W. HAUFF, E. F. KASTENHUBER. 

